C. emeroides. S.E. Eu. 
C. Emerns. Scorpion Senna; C. and S. Eu. 
CORYLOPSIS, Hamamelidaceae. Winter Hazel. Densely 
branched yellow-flowering shrubs rivaling the common golden- 
bells in early spring but of more refined appearance and habit. 
They require medium moist soil conditions and some protec¬ 
tion from cold winds [6H, 6D, nursery]. 
C. pauciflora. Japan (Ap.-My.). 
C. platypetala. C. China (Ap.-My.). 
C. sinensis glandulifera. C. and W. China (Ap.-My.). 
C. spicata. Japan (Ap.-My.). 
C. Willmottiae. W. China. 
CORYLUS, Betulaceae. Hazel. Large shrubs or small trees with 
conspicuous catkins early in the year. They need a rich soil if 
they are to fruit well [5E, 3J, nursery]. 
C. americana. American H.; Me. to Sask. and Fla. 
C. Avellana. European H.; Eu. 
C. A. fusco-rubra. 
C. A. quercifolia . 
C. A. urticifolia. 
C. Colurna. Turkish H.; S.E. Eu. and W. Asia. 
C. cornuta. Beaked H.; Que. to Ga. and Mo. 
C. heterophylla. N.E. Asia, Japan. 
C. Sieboldiana. Japanese H.; Japan. 
C. S. mandschurica. N.E. Asia and Japan. 
C. tibetica. Tibetan H.; C. and W. China. 
C. Vilmorinii (C. chinensis x Avellana). 
COTINUS, Anacardiaceae. Massive shrubs that bear mist-like 
plumy panicles of tiny flowers [2C, 5C]. 
C. Coggygria. Smoke-tree; S. Eu. to C. China and Himal. 
C. C. arborescens. 
C. C. purpureus. 
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